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首页> 外文会议>International Conference on Processing amp; Manufacturing of Advanced Materials Pt.2; Jul 7-11, 2003; Leganes, Madrid, Spain >Dilatometric Measurements on the Transformation Behaviour of Nb-added CSiMn TRIP Steels
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Dilatometric Measurements on the Transformation Behaviour of Nb-added CSiMn TRIP Steels

机译：掺N的CSiMn TRIP钢的相变行为的量热计量。

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摘要

The effect of a Nb-addition on the transformation behaviour of CSiMn TRIP steels was investigated: the dilatometer curves showing the typical transformation behaviour and the CCT-diagrams of the steels investigated are presented. It is well known that the processing of hot rolled TRIP steels requires a particular attention as to their chemical composition and still more to the thermomechanical cycle to be applied. In particular, the kinetics of the austenite/ferrite transformation are of interest. It is shown that the austenite/ferrite transformation, under laboratory simulation conditions, is rather sluggish. Furthermore, the influence of niobium on the hot deformation behaviour of TRIP steels is studied. It was demonstrated that the Nb-addition leads to a significant change of the kinetics of the ferrite formation under continuous cooling conditions as well as after hot deformation and cooling. On the other hand, the formation kinetics of the lower temperature transformation products (bainite,... ) are less affected. The results are compared with equilibrium Thermocalc calculations. Suggestions regarding the practical processing parameters are introduced. Based on the dilatometer results, some additional tests were carried out by means of a high strain rate MTS hot forging simulator.
机译：研究了添加Nb对CSiMn TRIP钢相变行为的影响：给出了表示典型相变行为的膨胀计曲线和所研究钢的CCT图。众所周知，热轧TRIP钢的加工需要特别注意其化学成分，还要更多地考虑要应用的热机械循环。特别地，奥氏体/铁素体转变的动力学是令人关注的。结果表明，在实验室模拟条件下，奥氏体/铁素体转变相当缓慢。此外，研究了铌对TRIP钢热变形行为的影响。结果表明，在连续冷却条件下以及在热变形和冷却之后，添加Nb会导致铁素体形成动力学的显着变化。另一方面，较低温度转化产物（贝氏体，...）的形成动力学受到的影响较小。将结果与平衡Thermocalc计算进行比较。介绍了有关实际加工参数的建议。根据膨胀仪的结果，通过高应变率MTS热锻模拟器进行了一些附加测试。

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